<span>1) a^6-a^(-5)-a^(-3) = а^(-3) * (a⁹ - a^(-2) -1)</span>
<span><span>2)x-3 = (√x - √3)(√x+√3)</span></span>
<span><span><span>3)-x-x^3-6-6x^2 = -(<span>x+x^3+6+6x^2</span>) = -((x+6) + (x³ + 6x²)) = -((x+6) + x²(x+6)) = -((x+6)(1+x²)) = -(x+6)(1+x²)</span></span></span>
1) a^6-a^(-5)-a^(-3) = а^(-3) * (a⁹ - a^(-2) -1))
2)x-3 = (√x - √3)(√x+√3)
3)-x-x^3-6-6x^2 = -(x+x^3+6+6x^2) = -((x+6) + (x³ + 6x²)) = -((x+6) + x²(x+6)) = -((x+6)(1+x²)) = -(x+6)(1+x²)
1)25^2-21^2=625-441=184